1-创建一个可以启动时如果没有一个账号刚创建1个新的账号
namespace MvcCookieAuthSample.Data
{
public class ApplicationDbContextSeed
{
public async Task SeedAsync(ApplicationDbContext context, IServiceProvider service)
{
if (!context.Users.Any())
{
var _userManager= service.GetRequiredService<UserManager<ApplicationUser>>();
var user = new ApplicationUser() {
Email="qinzhb@163.com",
UserName="qinzhb",
NormalizedUserName="qinzhb"
}; var result = await _userManager.CreateAsync(user, "123456@Byd");
if (!result.Succeeded)
{
throw new Exception("初始化用户失败");
} }
}
}
}
2-增加一个扩展方法，用于启动时初始化数据库
namespace MvcCookieAuthSample
{
public static class WebHostMigrationExtensions
{
public static IWebHost MigrationDbContext<TContext>(this IWebHost host,Action<TContext ,IServiceProvider> seeder)
where TContext:DbContext
{
using (var scope = host.Services.CreateScope())
{
var service = scope.ServiceProvider;
var logger = service.GetRequiredService<ILogger<TContext>>();
var context = service.GetService<TContext>(); try
{
context.Database.Migrate();
seeder(context, service);
logger.LogInformation("执行方法数据库初始化成功"); }
catch
{
logger.LogError("执行数据库数据库初始化密码失败");
} } return host;
}
}
}
3-把上面的2方法增加到启动类中
public static void Main(string[] args)
{
CreateWebHostBuilder(args) .Build()
.MigrationDbContext<ApplicationDbContext>((context,services)=> {
new Data.ApplicationDbContextSeed().SeedAsync(context, services).Wait();
}).Run();
}